OK, I'll bite...

What is the significance of the name "Ctein". That is, why did he change it? And the follow-up, why doesn't he use his given name?

(As a kid, I was the one who would just ask the guy in the wheelchair, "why don't your legs work" instead of tiptoeing around him. Embarassed my parents when I did that. So this line of questioning falls into the same "if you don't ask, you won't know" catagory).